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Colour Perception and the Visual System

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Questions and Answers

What is the range of light wavelengths that short cones are sensitive to?

495-570 nm

380-420 nm

620-750 nm

450-495 nm (correct)

What determines the perceived colour when the brain processes signals from cones?

The number of cones in the retina

The type of pigment in the cones

The intensity of stimulation of each cone type (correct)

The wavelength of light received by the cones

What is the term for the inability to distinguish certain shades of colour?

Colour adaptation

Colour blindness (correct)

Colour vision deficiency

Colour perception

What is the purpose of the eyes adapting to changes in lighting conditions?

To optimise colour vision Signup and view all the answers

What is the role of the brain in colour vision?

To process signals from cones Signup and view all the answers

What is the range of light wavelengths that long cones are sensitive to?

620-750 nm Signup and view all the answers

What is the most common type of colour vision deficiency?

Deuteranomaly Signup and view all the answers

What is the function of cones in the eye?

To recognize lights based on their wavelengths Signup and view all the answers

What is the effect of Deuteranopia on colour perception?

Difficulty distinguishing between red and green colours Signup and view all the answers

What is the cause of Protanomaly?

Abnormal function of red-green cones Signup and view all the answers

What is the result of Tritanopia on colour perception?

Difficulty distinguishing between blue and yellow colours Signup and view all the answers

What is the principle of image formation that occurs when light passes from one medium to another?

Refraction of light Signup and view all the answers

What is the result of the loss of optic nerve axons in glaucoma patients?

Visual field defects Signup and view all the answers

What is the term for islands of reduced sensitivity surrounded by better vision areas in patients with glaucoma?

Scotomata Signup and view all the answers

How many types of cones are responsible for colour vision in the human retina?

Three Signup and view all the answers

What is the location of the specialised photoreceptor cells responsible for colour vision?

Macula Signup and view all the answers

What is the process by which light is converted into electrical signals in the eye?

Photoreception Signup and view all the answers

What is the term for the fundamental aspect of human perception that allows humans to distinguish and interpret colours?

Colour vision Signup and view all the answers